I started making so many unforced errors and the set was gone probably in 10, 15 minutes.

Her serve was off, and she made 37 unforced errors.

He made a stupid unforced error in the second set and lost focus as a result.

He made 13 unforced errors, just 3 in the first set.

In the second set, she committed only seven unforced errors.

Cut out the unforced errors and you stand a chance.

He had 57 unforced errors, with 19 coming in the fifth set.

Williams made 32 unforced errors: an average of nearly two a game.

She never played good the whole time and had 40 unforced errors.

She committed 31 unforced errors in the second and third set.